Studies on the removal of arsenic (III) from water by a novel hybrid material

• Published in: Journal of hazardous materials Vol. 192; no. 2; pp. 899 - 908
• Main Authors: Mandal, Sandip, Padhi, T., Patel, R.K.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 30-08-2011; Elsevier
• Subjects: AAS; Adsorbents; Adsorption; Applied sciences; Arsenic; Arsenic - isolation & purification; BET; Chemical engineering; Contact; Exact sciences and technology; Hybrid material; Hydrogen-Ion Concentration; Ion exchange; ionic strength; Isotherms; Materials selection; Mathematical analysis; Microscopy, Electron, Scanning; Osmolar Concentration; Pollution; sorption isotherms; Temperature; Water Pollutants, Chemical - isolation & purification; Zirconium; BET; AAS; Arsenic; Isotherms; Hybrid material; Adsorption isotherm; Arsenites; Adsorption; Ionic strength; pH; Arsenic III; Ion exchanger; Atomic absorption spectrometry
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2011.05.099

► The removal of As (III) is about 98% at pH 7 with the hybrid material (ZrO-EA). ► The hybrid material exhibits specific surface area of 201.62
m
2/g. ► The adsorption of arsenic (III) from aqueous solution by the hybrid material is spontaneous. ► The material could be easily regenerated with sodium hydroxide at pH 12.
The present work provides a method for removal of the arsenic (III) from water. An ion-exchanger hybrid material zirconium (IV) oxide-ethanolamine (ZrO-EA) is synthesized and characterized which is subsequently used for the removal of selective arsenic (III) from water containing 10,50,100
mg/L of arsenic (III) solution. The probable practical application for arsenic removal from water by this material has also been studied. The various parameters affecting the removal process like initial concentration of As (III), adsorbent dose, contact time, temperature, ionic strength, and pH are investigated. From the data of results, it is indicated that, the adsorbent dose of 0.7
mg/L, contact time 50
min after which the adsorption process comes to equilibrium, temperature (25
±
2), solution pH (5–7), which are the optimum conditions for adsorption. The typical adsorption isotherms are calculated to know the suitability of the process. The column studies showed 98% recovery of arsenic from water especially at low concentration of arsenic in water samples.